Juan Manuel Mateo (born December 17, 1982) is a Dominican former professional baseball player. A right-handed starting pitcher, he played part of the 2006 season in Major League Baseball with the Chic
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2404ffb8b9d944bb2d211134d15b14c9bee91e036aec8a561d0478966686f4. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b9fbbe0-07fa-4173-a3e8-35b9d3f39cd4.json and https://artists.proofprofile.net/proofs/artist/1b9fbbe0-07fa-4173-a3e8-35b9d3f39cd4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).